Preparation and characterization of manganese oxide/CNT composites as supercapacitive materials |
| |
| Affiliation: | 1. Functional Thin Films Research Center, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China;2. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou 215123, China;1. Chemical and Materials Engineering, University of Cincinnati, Cincinnati, OH 45221, United States;2. Nanoworld Laboratory, RH 414, University of Cincinnati, Cincinnati, OH 45221, United States;3. Mechanical Engineering, University of Cincinnati, Cincinnati, OH 45221, United States;1. Department of Physics, Sree Vidyanikethan Engineering College, A. Rangampet 517102, India;2. Thin films laboratory, Department of physics, Sri Venkateswara University, Tirupati 517502, India;3. Shenzhen Engineering Lab of Flexible Transparent Conductive Films, Department of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen 518055, China;1. Electrochemical Materials Science Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630 006, India;2. Functional Materials Division, CSIR-Central Electrochemical Research Institute, Karaikudi, Tamil Nadu, 630 006, India;1. Energy Storage and Distributed Resources Division, Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, United States;2. School of Chemical and Engineering, Tianjin University, Tianjin, 300072, China;3. Science and Technology on Reliability Physics and Application of Electronic Component Laboratory, No. 5 Electronic Research Institute of the Ministry of Industry and Information Technology, Guangzhou, 510610, China;4. McNair Technology Co., Ltd., Dongguan, Guangdong, 523700, China;5. Department of Chemistry and Biochemistry, University of California, Santa Barbara, 93106, United States |
| |
| Abstract: | Manganese oxide was synthesized and dispersed on carbon nanotube (CNT) matrix by thermally decomposing manganese nitrates. CNTs used in this paper were grown directly on graphite disk by chemical vapor deposition technique. The capacitive behavior of manganese oxide/CNT composites was investigated by cyclic voltammetry and galvanostatic charge–discharge method in 1 M Na2SO4 aqueous solutions. When the loading mass of MnO2 is 36.9 μg cm? 2, the specific capacitance of manganese oxide/CNT composite (based on MnO2) at the charge–discharge current density of 1 mA cm? 2 equals 568 F g? 1. Additionally, excellent charge–discharge cycle stability (ca. 88% value of specific capacitance remained after 2500 charge–discharge cycles) and power characteristics of the manganese oxide/CNT composite electrode can be observed. The effect of loading mass of MnO2 on specific capacitance of the electrode has also been investigated. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
